A muscle car built by GM's Pontiac that started being built in 1987. These cars are 3rd generation Pontiac Firebird Trans Ams powered with the 5.7 liter L98 V8 that was originally in the Corvette. GTA stands for Gran Turismo Americano. Stock these cars came with 245 horse power and 345 ft-lbs of torque. The GTA ended production in 1992 due to the redesigning of the Firebird.